When we investigated the correlation between LysoPS and PS-PLA1, however, we found that the total LysoPS and 18:0 LysoPS levels were weakly, but significantly and positively, correlated with the PS-PLA1 level only in the ascites from the subjects with gastric cancer (r = 0.331, P = 0.022 and r = 0.356, P = 0.013, respectively) (Fig. 6C–F, supplemental Fig. S5), suggesting that the homeostasis of LysoPS might differ between patients with gastric cancer and those with cirrhosis. Here, PLA1A is linked to gastric cancer.